Polywell and patents

[torshie]

Just curious, is the basic polywell design patented or public domain ?
I mean just the basic 6 coil design, since some minor modifications/improvements to the basic design are probably patented.

[D Tibbets]

The original patent was granted ~ 1988(?). Another patent of WB6 refinements- round casings and spacing was applied for ~ 2008 but this was denied, apparently because it was not deemed sufficiently different from the earlier patent. The earlier patent has expired.

Dan Tibbets

[mattman]

Several Polywell patents have been filed. Some have even been approved.